Answer:
23 x 3 = 69
Step-by-step explanation:
Try this option (<u>not for all the tasks!</u>):
1) rule for n-angle is: S=180°(n-2), where n - number of the sides. S₁₅=180*13=2340°;
2) S₂₅=180*23=4140°;
4) this is deltoid;
5) this is paralelogram;
6) x=130°; y=50°;
10) x=90°; y=30° (it is deltoid);
12) not enough info for parallelogram (the same for deltoid);
14) it is enough: according to a property of a parallelogram (it means that a square and rombus are parallelograms);
15) it is enough according to the properties of parallelograms;
16) x=2; y=1;
18) poit S(0;0); point T(b+c;d). The coordinates of the midpoint are (0.5b+0.5c;0.5d); slope=arctg(d/(b+c)).
Answer:
Second Option: ![\frac{7}{8} =7\div8](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B8%7D%20%3D7%5Cdiv8)
Step-by-step explanation:
A fraction means to divide.
![1\div2=\frac{1}{2}](https://tex.z-dn.net/?f=1%5Cdiv2%3D%5Cfrac%7B1%7D%7B2%7D)
Therefore,
![\frac{7}{8} =7\div8](https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B8%7D%20%3D7%5Cdiv8)
Answer:
The probability is 7/15 or 0.47
Step-by-step explanation:
;)
Answer:
i think it is c or d
Step-by-step explanation: